<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>宇智波族徽</title>
    <style>
        /*简陋版*/
        * {
            background: #000;
        }

        .d1, .d2 {
            width: 200px;
            height: 200px;
            background: red;
            border-radius: 50%;
        }

        .d2 {
            height: 100px;
            background: white;
            border-radius: 0 0 100px 100px;
            margin-top: -100px;
        }

        .d3 {
            width: 30px;
            height: 120px;
            background: white;
            margin: -3px 0 0 85px;
        }

        /*优化版*/
        .d4 {
            width: 200px;
            height: 200px;
            background: white;
            border-radius: 50%;
            /*盒子阴影*/
            /*水平偏移量 垂直偏移量 模糊半径 阴影尺寸 阴影颜色 内阴影*/
            box-shadow: 0px 100px 0px 0px red inset;
        }
        .d5 {
            width: 30px;
            height: 120px;
            background: white;
            margin: -3px 0 0 85px;
        }
    </style>
</head>
<body>
<div class="d1"></div>
<div class="d2"></div>
<div class="d3"></div>

<div class="d4"></div>
<div class="d5"></div>
</body>
</html>